[Thom]

I was thinking of building a planetrainer out of round stick sitting horizontal app 20" high. Then you can slide the puttershaft along the stick.

It's inspired by the "bench drill" I've seen on pics from the workshops.

Would it work? I'm aware that you can change the planeangle during the swing by lifting or lowering the hands, but then you'll miss the ball or at least the sweetspot.